<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .heaader{
            height: 200px;
            background-color: #2ca02c;
        }
        .middel{
            height: 300px;
            background-color: #5bc0de;
        }
        .footer{
            height:100px;
            background-color: #ac2925;
        }
    </style>
</head>
<body>
<div class="heaader">头
    @if(isset($page))
        第{{$page}}页
    @else
        第1页
    @endif
</div>
{{--@yield('content')--}}
@section('content')
    xxxxxxx
    @show
<div class="footer">尾巴</div>
</body>
</html>